User blog comment:Jwle7/List of All Rares, Very Rares, One-Time-Only Non-Legendaries/@comment-32675475-20171127014453/@comment-32675475-20171127014641

http://brickbronze.wikia.com/wiki/Appendix%3AElemental_Monkeys

That tells you a bit about them and will tell if they are or not